Scalper and bolter.



No. 7||,83o. Patented oct. 2|, 1902.

l. n. nwmsou.v SCALPEB AND BOLTEB.

(Application filed Mar.- 19, 1901.)

{No Model.)

m I 19a-2131er l v 4 vqfmgcys UNITED STATES PATENT OFFICE.

GEORGE R. DAVIDSON, OF LENOX, IVIICHIGAN.'l

SCALPER AND BOLTER.

SPECIFICATION forming part 0f Letters Patent N0. 711,830, dated-October21, 1902. Application filed March 19,1901. Serial No. 51,928. (Nomodel.)

To all whom, it may concern:

Be it known that I, GEORGE R. DAVIDSON, a citizen of the United States,residing at Lenox, in the county of Macomb and State of Michigan, haveinvented a new and useful Scalper and Bolter, of which the following isa specification.

My invention is an improved scalper and bolter; and it consists in the.peculiar construction and combination of devices hereinafter fully setforth and claimed. y

In the accompanying drawings, Figure lis a vertical sectional view of ascalper and bolter constructed in accordance with my invention. Fig. 2is an exterior elevation of the same, partly in section, at right anglesto Fig. 1. Fig. 3 is a detail perspective view of a portion of theendless traveling belt, showing one of the brushes thereon. Fig. 4 is atransverse sectional view of the same. Fig. 5 is a detail elevation ofthe lower portion of the casing.

The casing 1, which is preferably of the form shown and having thedownward-converging sides 2, is supported in a suitable frame 3. aninlet 4. At the lower end thereof are outlets 5 6, which are divided bya vertical plate or board 7. On one side of the casing, near the upperend thereof, is an outlet 8. A pair of pulleys 9 10 are respectivelylocated within the casing near the upper and lower ends thereof. Theshaft 11 of pulley 9, which is journaled in bearings 12 on the frame 3,is provided at oneend with a power-pulley 13. The shaft 14 of pulley 10isjournaled in bearing-blocks l5, which are vertically adjustable inframes 16, that are bolted on the crossbars 17, which form part of theframe 3. Setscrews 1S are provided to vertically adjust' thebearing-blocks 15, and hence adjust the shaft 14.

Vithin the casing at a suitable distance from the inclined sides thereofis a screen 19, which extends from the inlet-opening 4 to the outlet S.AThe upper and lower Vportions of said screen are Ycurved concentricallywith the pulleys 9 l0, as shown, and the side portions thereof areinclined and converge downwardly. Both inclined sides of the screen mayhave meshes of the same size, or one side of the screen may be finerthan the other.

At the upper end of the casing isy An endless traveling belt or apron 2Oconnects the pulleys 9 10. On the outer side of said belt 20, atsuitable distance apart, are secured transversely-disposed flight-blocks21, each of which is triangular in cross-section, as shown, and whichoperate on the inner side of the screen 19. Intermediate of each pair offlight-blocks is a brush 22, which also operates on the inner side ofthe screen. The head 23 of each brush is secured between a pair oftransversely-disposed blocks 24, that are secured on the outer side ofthe belt 20. The head of each brush is provided with adjusting-slots 25,through which extend adjusting-bolts 26, that are secured in the pair ofblocks 24. Hence each brush may be adjusted toward or from the screen,as may be required. As each brush becomes worn it is moved toward thescreen to compensate for the Wear of the bristles.

The Hight-blocks, as will be understood, carry the material, theinclined upper sides of the flight-blocks causing the material to be fedoutwardly to the screen, and said flightblocks prevent the material fromlying in masses .on the brushes, the material which descends frombetween the flight-blocks and the screen falling upon the brushes inmoderate quantities.

The operation of my invention is as follows: Assuming that the belt 2Qis traveling in the direction indicated by the varrows in Fig. 1, thematerial which is fed to the machine through the inlet 4 is subjected tothe action of the screen and ,the brushes and blocks which operateagainst it. The material which passes outwardly through the screenopposite the downwardly traveling lead of the belt is discharged throughthe outlet 5. The material which passes outwardly through the screenopposite the upwardlytraveling lead of the belt is discharged throughthe outlet 6. Such material as fails to pass through the screen isdischarged through the outlet 8. The belt 20 may be run in eitherdirection. When the same is to be run in the reverse direction to thatindicated by the arrows in Fig. 1, the material is fed to the machinethrough a supplemental inlet 27, which is indicated in dotted lines inFigs. l and 2.

By disposing the leads of the belt so that IOO they converge downwardlyand by disposing the sides of the screen parallel with the respectiveleads of the belt the said inclined sides of the screen also convergedownwardly, and thereby the inclined leads of the belt overhang theinclined sides of the screen, which disposition of the leads of the beltprevents the material from adhering to the leads of the belt andfacilitates its outward passage over the flight-blocks to the inclinedsides of the screen, thereby counteracting any tendency of the materialto adhere to the belt and flight-blocks and choking between them and thescreen.

Having thus described my invention, I claim- 1. The combination of acasing having a screen therein with downwardly-converging inclined sideportions, an endless belt having leads parallel with said convergingsides of the screen and over-hanging the same, revoluble supportingelements for said endless belt, alternately-disposed Hight-blocks andbrushes on said belt, and spaced apart, said flight-blocks, brushes andscreen coacting, a discharge at the upper end of one of the inclinedportions of the screen and means at the upper end ot' the casing to feedmaterial between said belt and screen, substantiallyas described.

2. The combination of a casing having an inlet-opening at its upper end,a dischargeopening on one side, near the upper end thereof, and adischarge-opening at its lower end, a screen in said casingv andextending from said inlet-opening downwardly above the lowerdischarge-opening and thence upwardly to said upper discharge-opening,an endless traveling element parallel with said screen and brushes andflight-blocks on said endless traveling element, the latter and thescreen confining material between them, the brushes acting on the screento force material therethrough and the flight-blocks operating to carrythe material ahead of the brushes, to feed the same in moderatequantities thereto and to prevent the material from lying in masses onthe brushes, substantially as described.

3. The combination of a casing having a screen therein withupwardly-extending side portions, an endless traveling belt having leadsparallel with the side portions of the screen, means,carried by thebelt, acting upon the screen to force material therethrough, a dischargefor the bolted material from each side of the screen, a discharge at theupper end of one of the side portions of the screen, for the tailings,and means at the upper end of the casing to feed material between thebelt, and the screen, substantially as described.

4:. In combination with an upright screen, an endless belt having onelead opposite the screen and alternately-disposed brushes and{iight-blocks spaced apart and carried by the belt, the brushes actingupon the screen and the Hight blocks traveling ahead of the brushes tocarry the material ahead of the brushes and feed the same to the screen,whereby the material is prevented from lying in masses on the brushes,substantially as described.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in the presence of two witnesses.

GEORGE R. DAVIDSON.

Witnesses:

ARTHUR HENRY HUNvIcK, CLARENCE JOHNS.

